scholarly journals Optimization of a reinforced concrete structure subjected to dynamic wind action

2021 ◽  
Vol 16 (59) ◽  
pp. 326-343
Author(s):  
Jherbyson Brito ◽  
Letícia Miguel
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Concrete Structure ◽  
Frame Structure ◽  
Reinforced Concrete Structure ◽  
Maximum Displacement ◽  
Reinforced Concrete Building ◽  
Synoptic Wind ◽  
Whale Optimization ◽  
Concrete Building

This work proposes a methodology to optimize a reinforced concrete structure. For this, the Whale Optimization Algorithm (WOA) algorithm was used, an algorithm from the group of metaheuristic algorithms, which presents an easy computational implementation. As a study object, a frame structure adapted from a real reinforced concrete building was used, subjected to the dynamic action of artificially generated synoptic wind. The objective function is to reduce the volume of concrete of the structure. For that, the dimensions of the cross-sections were used as design variables, and the maximum displacement at the top imposed by the ASCE / SEI 7-10 standard as a lateral constraint, as well as the maximum story drift between floors. In addition to this structural optimization, it was also proposed the use and optimization of Tuned Mass Dampers (TMD), in different quantities, positions and parameters, improving the dynamic response of the reinforced concrete building. The results show that for this situation it was possible to reduce the concrete volume of the structure by approximately 24%, respecting the maximum limit of displacement at the top required by the standard.

Seismic Performance of a Mixed Masonry-Reinforced Concrete Building

2015 ◽  
pp. 293-312 ◽  
Author(s):  
Vincenzo Gattulli ◽  
Francesco Potenza ◽  
Filippo Valvona
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Discrete Models ◽  
Reinforced Concrete Structure ◽  
Reinforced Concrete Building ◽  
Seismic Performance Evaluation ◽  
Current Limit ◽  
Concrete Building ◽  
Nonlinear Static Procedure ◽  
The City

The 6th of April 2009, a quite strong earthquake of magnitude ML =5.8 (Mw=6.3), struck in the city of L'Aquila. The seismic event caused serious injure to several masonry buildings, compromising a large part of the valuable historical and architectural heritage. The present work deals with seismic performance evaluation of an existing mixed masonry-reinforced concrete building in downtown L'Aquila city. A comprehensive discussion on the current limit capacity of the building based on the visual inspections of the occurred seismic damage, the experimental data from a wide campaign of on-site tests on the material properties, the results of numerical simulations from different naturally discrete models of the mixed masonry-reinforced concrete structure are presented. The seismic performance is evaluated through well-recognized N2 nonlinear static procedure. The Frame by Macro-Elements method is used to define an equivalent 3D frame representation of the structure. The obtained numerical results are directly compared with the surveyed damages.

Structural Comparison and Project Cost Analysis on Two Kinds of Frame Structures

2012 ◽  
Vol 193-194 ◽  
pp. 1197-1200
Author(s):  
Zhong Min Liu ◽  
Xue Hua Liu ◽  
Jing Ji
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Steel Structure ◽  
Development Trend ◽  
Economic Benefits ◽  
System Structure ◽  
Frame Structure ◽  
Reinforced Concrete Structure ◽  
Project Cost ◽  
Advantages And Disadvantages

This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects. The advantages and disadvantages of them are analyzed, and the engineering cost is compared and analyzed. Results show that the steel structure has more the advantage than reinforced concrete structure, and it is development trend of factories and high-rise building in the future.

METHOD OF EVALUATION OF THE FIRE RESISTANCE OF COMPOSITE BUILDING STRUCTURES

2018 ◽  
Vol 8 (3) ◽  
pp. 12-17
Author(s):  
Denis A. PANFILOV ◽  
Nikolay A. ILYIN ◽  
Yury V. ZHILTSOV ◽  
Ekaterina V. BLINKOVA
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Concrete Structure ◽  
Building Structures ◽  
Reinforced Concrete Structure ◽  
Resource Saving ◽  
Concrete Building ◽  
Innovative Solution ◽  
Method Of Evaluation ◽  
Building Practice

The article describes a new method for determining the design fi re resistance of composite (steel-concrete) building constructions of buildings. The advanced algorithm of the decision of the fi re-technical task in the part of express calculation of design fi re resistance of composite building constructions is given. A new constructive form of composite reinforced concrete structure of the building has been developed and the system of actions for assessing the fi re resistance of its elements at the level of inventions, which are implemented in building practice, has been improved. The components of the creative result of scientifi c work and the content of the technical eff ect, including resource saving, are introduced, with the introduction of an innovative solution in the practice of fi re protection and providing fi re resistance of perspective building constructions of buildings.

Calculation Models of the Bearing Capacity of Span Reinforced Concrete Structure Support Zones

2019 ◽  
Vol 968 ◽  
pp. 209-226
Author(s):  
Vasyl M. Karpiuk ◽  
Yulia A. Syomina ◽  
Diana V. Antonova
Keyword(s):  
Reinforced Concrete ◽  
Crack Resistance ◽  
Cross Sections ◽  
Concrete Structure ◽  
Strain State ◽  
Complex Stress ◽  
Deformation Analysis ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Structure

Experience gained in design, erection and operation of span reinforced concrete structures has proved that practically all of them are subject to complex stress-strain state. At that, the researchers pay considerable greater attention to calculation of strength, deformation analysis and determination of crack resistance in normal cross-sections than to calculation of their support zones, including oblique sections, which results are generally taken into account for determining the section dimensions and the quantity of the cross reinforcement.

scholarly journals Does the design according to the seismic zone affect the environment and the manufacturing cost of a 5-storey R/C building with a conventional plan?

2021 ◽  
Vol 899 (1) ◽  
pp. 012032
Author(s):  
Theodoros Chrysanidis ◽  
Athina Gkigki ◽  
Grigorios Papageorgiou ◽  
Nikolaos Alamanis
Keyword(s):  
Reinforced Concrete ◽  
Cross Sections ◽  
Manufacturing Cost ◽  
Seismic Zone ◽  
Structural Members ◽  
Reinforced Concrete Building ◽  
Reinforced Concrete Slabs ◽  
Concrete Building ◽  
The Cost ◽  
Bearing Structure

Abstract The main scope of the present research is the analysis, dimensioning and estimation of the cost of a five-storey reinforced concrete building, which is similarly constructed in three different seismic hazard zones (ZI, ZII, ZIII). The ground plan of the building is a conventional floor plan with solid reinforced concrete slabs. The cross-sections of the structural members remain stable, except for the columns whose cross-sections are reduced in height. The aim of the present study is to analyze how the cost of manufacturing the load-bearing structure of a reinforced concrete building is affected by the seismic risk of the area, if that influence is significant and in what extent. Moreover, along with the construction cost, the possible influence to the environment is studied, too.

scholarly journals The application of interval calculus in estimation of dynamic characteristics of structures

2012 ◽  
Vol 10 (2) ◽  
pp. 223-234
Author(s):  
Djordje Djordjevic ◽  
Predrag Petronijevic
Keyword(s):  
Reinforced Concrete ◽  
Linear Systems ◽  
Cross Sections ◽  
Dynamic Characteristics ◽  
Modulus Of Elasticity ◽  
Concrete Structure ◽  
Direct Effects ◽  
Reinforced Concrete Structure ◽  
Numerical Example ◽  
Geometrical Characteristics

The paper analyzed application of interval calculus in estimation of dynamic characteristics of linear systems. The eigen periods of oscillation of structures are affected by several parameters: geometrical characteristics of cross sections of members, magnitude of the mass concentrated in the floors and modulus of elasticity of materials. As a numerical example, the frame reinforced concrete structure was taken, for which the mentioned parameters are given in the form interval. The result is also obtained in the form of interval so it is possible to observe the direct effects on the value of the structural oscillation periods by changing one or several parameters.

scholarly journals Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

2018 ◽  
Vol 195 ◽  
pp. 02035
Author(s):  
Akmaluddin Akmaluddin ◽  
Ni Nyoman Kencanawati ◽  
Ahmad Gazi Paedullah
Keyword(s):  
Reinforced Concrete ◽  
Residual Strength ◽  
Concrete Structure ◽  
Good Condition ◽  
Pulse Velocity ◽  
Test Method ◽  
Building Structures ◽  
Reinforced Concrete Structure ◽  
Existing Building ◽  
Concrete Building

A condition assessment of reinforced concrete building structures can be conducted accurately when the components of the building structure data are available. Otherwise, data must be developed through testing directly in the field. Non-Destructive Test method (NDT) was considered to avoid disruptions to the existing building structures. This study aims to develop a model for interpreting the residual strength of concrete structures in the field. Nine cylinder specimens with a diameter of 150 mm and a height of 300 mm and 27 cube specimens of 200x200x200 mm were prepared. Nine reinforced concrete beam specimens of 100x150x1100 mm were also prepared to represent a component of the reinforced concrete structure. Hammer and UPV apparatuses were applied to the cylinder and cube specimens considered. Results concluded that the value of the pulse velocity is directly proportional to the load and inversely proportional to the residual strength. The concrete structure with a residual strength of more than 60% is considered healthy or a structural in “good” condition. The concrete structure is also healthy when the v measured gives a value of 3.5 and above. This value is acceptable as it lies within the range v given in the reference of 3.5 to 4.5.

scholarly journals persamaan empiris waktu getar alami struktur pelat datar beton bertulang berdasarkan hasil analisis vibrasi 3 dimensi

2016 ◽  
Vol 13 (2) ◽  
pp. 116
Author(s):  
Agus Setiawan
Keyword(s):  
Reinforced Concrete ◽  
Flat Plate ◽  
Concrete Structure ◽  
Three Dimensional ◽  
Frame Structure ◽  
Fundamental Period ◽  
Reinforced Concrete Structure ◽  
Base Shear ◽  
Standard Code ◽  
Steel Frame Structure

persamaan empiris waktu getar alami struktur pelat datar beton bertulang berdasarkan hasil analisis vibrasi 3 dimensiEmpirical Formula for Fundamental Period of Flate Plate Reinforced Concrete Structure Based on 3 Dimentional Vibration AnalysisAgus SetiawanJurusan Teknik Sipil, Fakultas Teknik,Universitas Pembangunan Jaya Alamat Korespondensi : BJl. Cendrawasi, Ciputat, Sawah Baru, Tangerangan Selatan, Banten 15413Email : [email protected] of the parameters required in the calculation of seismic base shear on a structure is the fundamental period of the structure. The fundamental period of structure can be obtained through three-dimensional dynamic analysis of the structure. Indonesian Standard Code for Earthquake Resistance Building, SNI 1726-2012, given some empirical equations to calculate the fundamental period ofsome structural system. Some of the given equation can be used for concrete and steel frame structure. However, for the flat plate reinforced concrete structure, sometimes the fundamental period approached as “other structural systems”, which of course can not be shown for accuracy. This study was conducted to obtain an empirical equation that can be used to calculate the fundamental periodof a flat plate structure. The flat plate reinforced concrete structure model being analyzed is vary in total floor number, which varies from 1 to 10 floors, and the width of the building from 20 to 28 meters. From the analysis results obtained relationship between fundamental period, building width and building height in the form Ta = 0,0022(B)’”hn1,15, for the un-cracked section. And Ta = 0,0025(B)’”hn1,28, for the condition of cracked cross-section, with Tn is fundamental period, B is the width of the building plan, and hn is the height of the building.Keywords : Time Period, Flat Plate, Reinforced ConcreteAbstrakSalah satu parameter yang diperlukan dalam perhitungan gaya geser dasar seismik pada suatu struktur adalah besarnya waktu getar alami dari struktur tersebut. Nilai waktu getar alami struktur dapat diperoleh melalui hasil analisis dinamik 3 dimensi dari struktur tersebut. Namun dalam Standar Perencanaan Ketahanan Gempa SNI 1726-2012, juga diberikan beberapa persamaan empiris untuk menghitung waktu getar alami struktur. Beberapa persamaan yang diberikan dapat digunakan untuk sistem struktur rangka beton dan baja. Namun untuk sistem struktur berupa pelat datar (flat plate) beton bertulang, terkadang nilai waktu getarnya didekati sebagai “sistem struktur lainnya”, yang tentu saja tidak dapat ditunjukkan keakuratannya. Penelitian ini dilakukan dengan tujuan untuk mendapatkan persamaan empiris yang dapat digunakan untuk menghitung waktu getar alami suatu struktur pelat datar. Model yang dianalisis berupa struktur pelat datar beton bertulang, dengan jumlah lantai bervariasi dari 1 hingga 10 lantai, serta lebar bangunan dari 20 hingga 28 meter. Dari hasil analisis diperoleh hubungan waktu getar alami dengan lebar bangunan dan tinggi bangunan dalam bentuk Ta = 0,0022(B)’”hn1,15, untuk kondisi penampang utuh. Serta Ta = 0,0025(B)’”hn1,28, untuk kondisi penampang retak, dengan Tn adalah waktu getar alami, B adalah lebar denah bangunan, serta hn adalah tinggi bangunan.Kata kunci : Waktu Getar Alami, Pelat Datar, Beton Bertulang

Frequency of the Analysis Response of Reinforced Concrete Structure Subjected to Road and Rail Transport Effects

2014 ◽  
Vol 969 ◽  
pp. 182-187 ◽  
Author(s):  
Ivo Demjan ◽  
Michal Tomko
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
3D Model ◽  
Spectral Response ◽  
Random Excitation ◽  
Rail Transport ◽  
Reinforced Concrete Structure ◽  
Load Spectra ◽  
Concrete Building ◽  
Transport Effects

A 3D model of a reinforced concrete building was created using a dynamic analysis which focused on the spectral response of the object represented by a random excitation experiment found in records in the form of load spectra.

scholarly journals The effect of story drift in a multi-story building under the influence of an earthquake

2021 ◽  
Vol 17 (3) ◽  
pp. 270-277
Author(s):  
Dmitriy A. Sharapov ◽  
Tesfaldet H. Gebre ◽  
Yusuf M. Ali
Keyword(s):  
Reinforced Concrete ◽  
Horizontal Plane ◽  
Seismic Behavior ◽  
Lateral Force ◽  
Seismic Loads ◽  
Reinforced Concrete Structure ◽  
Maximum Displacement ◽  
Concrete Building ◽  
Story Drift ◽  
Story Building

This paper content is structure subjected sudden story drift as a result from earthquakes, forming hinges and eventually collapsing. The aim of this paper is to develop building thirty story building for seismic in Khartoum using finite element method (FEM) and the equivalent lateral force (ELF) procedure of American code ASCE 7-16. In current work the thirty-story reinforced concrete building was considered is to analyze the seismic behavior of the reinforced concrete structure to find the drift between the story by finding the maximum displacement from the program that causes the building to collapse, by choosing the shear wall as the support system to resist the lateral load and by looking to model the building inclined to the horizontal plane. Calculations were also made on the drift between the story to compare with the allowable drift. It is implemented in the Robot structural program - an ingenious program for designing and analyzing lateral (seismic) loads.

Sign in / Sign up

Export Citation Format

Share Document